RJ45 & Ethernet Connectors

RJ45 & Ethernet Connectors

The RJ45 Connector is a standardized physical interface primarily used for communication between devices like computers, routers, and switches. While "RJ45" refers specifically to the plug and port design, Ethernet describes the broader networking protocol that these connectors facilitate. The RJ45, or Registered Jack 45 standard, emerged in the 1970s when Bell Laboratories developed interfaces to replace bulky, hardwired telephone installations. The connector was adopted for computer networking in the 1980s and once paired with Twisted-pair Category cables like early CAT3, RJ45 became the reigning global standard for Ethernet networking.

Only The Best!
Markertek's diverse selection of professional RJ45 connectors is backed by full technical support and unbiased advice! We only offer the finest products available, from top brands like Platinum Tools, Belden, Calrad, Connectronics, and legendary etherCON creator Neutrik! Markertek Sales Engineers can help, no matter your skill level, providing guidance and support for projects big or small!

Breaking It Down
RJ45 connectors can be classified by the way they're shielded from the Electro Magnetic Interference caused by lighting, machinery, ungrounded equipment, and Mother Nature! The standard plastic rectangular connectors used in most homes and offices are Unshielded (UTP), designed for environments with minimal EMI. Shielded (STP/FTP) options are encased in an insulated metal shell to block electronic noise caused by power lines or infrastructure, and Ruggedized Industrial Style connectors provide protection from the elements themselves, featuring waterproof housings and vibration resistance. Termination is another distinction, Standard (Non-Pass-Through) is traditional, wires are cut then inserted into a plug with a backstop, Pass-Through allows wires to slide through the body to verify the color order, Toolless options feature a snap-fit or hinged design for termination without specialized tooling and Load Bar (Staggered) examples hold wires in a staggered "four-high, four-low" pattern reducing crosstalk in high-speed applications.

On Your Side - Why Purchase From Markertek?
RJ45 connectors are designed to match specific cable categories so using a lower-rated connector on a higher-rated cable or mixing shielded and unshielded connectors will compromise performance, you need to get it right! Markertek is ready to assist, our technicians have decades of hands-on experience with RJ45 and Ethernet connectors, and we STOCK the cable, tools and accessories needed to finish the job! Plus, shopping with Markertek opens options like pre-made and custom RJ45 and Ethernet Cables designed to suit your needs. Contact us today!

FAQ

Do all RJ45 / Ethernet connectors require specialized tools?
While most RJ45 connectors do use proprietary strippers, crimpers, and dies, many manufacturers offer user-friendly field-terminable models that are HDBaseT and PoE+ compliant.

How far can RJ45 Connectors send a signal?
When using an RJ45 connector for Ethernet, the maximum recommended cable length is 328 feet (100 meters).

Can I use ANY RJ45 connector with ANY Category Cable?
No, you must match the connector "Category" with the corresponding cable "Category"; for instance, Cat5e connectors will only perform properly if attached to Cat5e cable.